I want to reroof my double garage which currently has decayed fibre cement panels. I would like to use some sort of tiles if possible but would welcome any other suggestions for an aestheticlly pleasing roof. Problem is that it is only an 11.5 degree pitch.

minimum pitches for tiles.
rough guide.
30-35deg pitch plain tiles.
20 deg slates.
17-30 deg conc. interlocking.
there are a number of designs of interlocking tiles, only a few of which will allow for a shallow pitch. marley make a "wessex" which will go down to 15 deg with 100mm headlap.

DON'T get discouraged by comments in these threads like 'sharp in-take of breath' (not picking on anyone - just pointing out that, to be really useful, advice aught to be qualified). Other things like allowing sags in breather membranes/roofing felt will greatly reduce the chance of water going through nail holes, as will using thicker battens to prevent tile nails puncturing the felt. Proper ventilation will also help dry out those wet battens!

The Building Regs guys are there to help. In some cases they may be a bit over zealous but the other day I was told of one case of a private Regs company certifying what the council would not.